This temple is apparently the only temple of its kind. Meaning, it was built during a time when Japan was occupying Korea. It was built by a Japanese Buddhist Monk and is the only remaining Temple in Korea that was built in this style [Japanese]. There are still houses and other buildings in Gunsan with the Japanese style (tiles, roofing, walls) standing today. I got to see some of them while I was on a quick tour of Gunsan.